About 20 percent of third-party apps available through the Android marketplace allow third-party access to sensitive data, and can do things like make calls and send texts without the owners' knowledge, according to a recent security report from security firm SMobile Systems. There's no indication that any of the highlighted apps is malicious, but the report does underscore the inherent risks of a more open ecosystem as opposed to Apple's oppressive yet more controlled environment, with every app being vetted before availability.